Add Killercoda examples：propagate Deployment and CRD application with Karmada

[JadeFlute0127]

What would you like to be added:
Add Karmada propagate examples with killercoda, including propagate Deployment example and and propagate CRD application example, both containing installation and deploying to multi-clusters steps.

Tasks:

1. Implement propagate Deployment example.
   • Using CLI to implement the steps of propagate deployment to multi-clusters
2. Implement propagate CRD application example.
   • Using CLI to implement the steps of propagate CRD application to multi-clusters

[JadeFlute0127]

/assign